linux-kernel - KSM kernel interface

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Date:	Sat, 19 Feb 2011 04:07:41 +0000
From:	supercilious.dude@...il.com
To:	linux-kernel@...r.kernel.org
Subject: KSM kernel interface

Hi,

Is there a way to enable KSM globally for all eligible pages in the 
system such that applications need not call madvise() themselves? If 
not, is there a way to do so on behalf of a particular application 
without an ugly LD_PRELOAD hack?

Perhaps there is a small kernel modification that might make this 
possible or provide a sysfs flag that enables it (off by default of course)?

I read through the code very briefly, and as far as I can tell, I need 
to add the VM_MERGEABLE flag to all eligible VMAs at the time they are 
created and also __ksm_enter() the associated mm_struct at creation 
also. Would that work?

Thanks

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